The P0091 fault code applies to all vehicle manufacturers and means “Fuel Pressure Regulator 1 Control Circuit Low.”
The P008B fault code applies to all vehicle manufacturers and means “Low Pressure Fuel System Pressure – Too High.”
The P0090 fault code applies to all vehicle manufacturers and means “Fuel Pressure Regulator 1 Control Circuit/Open.”
The P008F fault code applies to all vehicle manufacturers and means “Engine Coolant Temperature/Fuel Temperature Correlation.”
The P008E fault code applies to all vehicle manufacturers and means “Fuel Cooler Pump Control Circuit High.”
P008D is a generic diagnostic trouble code (DTC) that applies to all vehicle manufacturers. It means “Fuel Cooler Pump Control Circuit Low.”
P008A is a trouble code applicable to all vehicle manufacturers, meaning “Low Pressure Fuel System Pressure – Too Low.”
The P008C fault code applies to all vehicle manufacturers and means “Fuel Cooler Pump Control Circuit/Open.”